const Page = require("../../models/page");
const User = require("../../models/user");
const Book = require("../../models/book");
const Joi = require('@hapi/joi');
const config = require('../../lib/config');
const { Mongoose } = require('mongoose');
exports.booklist = async (ctx) => {
  let user;

    try {
        book = await Book.find()
            .sort({created: -1})
            .exec();
    } catch (e) {
        return ctx.throw(500, e);
    }

    ctx.body = book;
}


exports.addBook = async (ctx) => {
    //const file = ctx.request.files; 
    // console.log("file\n", file)
    // console.log(file.image.path)
    //ctx.request.body.image = fs.readFileSync(file.image.path);

    const {
      title,
      author,
      contents,
      cover,
      hashtag,
    } = ctx.request.body;
  
    const schema = Joi.object().keys({
      title: Joi.string().required(),
      author: Joi.string(),
      contents: Joi.string().allow(null, ''),
      hashtag: Joi.string().allow(null, ''),
      cover: Joi.allow(null, ''),
    });
    try {
        await schema.validateAsync(ctx.request.body);
      } catch (err) {
        console.log('add book validaton' + err);
        ctx.status = 400;
        return;
      }
      ctx.request.body.author = ctx.state.user;
      const book = new Book(ctx.request.body);
    
      try {
        book.save(async (err) => {
          if (err) throw err;
          const user = await User.findById(ctx.state.user._id).exec();
          console.log(book._id);

        });
      } catch (e) {
        ctx.throw(500, e);
      }
      ctx.body = book;
      ctx.status = 200;
};

exports.getOneBook = async (ctx) => {

  const bookid = ctx.request.body._id;
  console.log(bookid);
    try {
      const mybook = await Book.findById(bookid).exec();
      const user = await User.findById(mybook.author).exec();//작가정보
      const author_name = user.nickname;
      const bookInfo = {
        "author_name":author_name
      }
      ctx.body = {mybook,author_name:author_name}
      console.log(mybook)
      //ctx.body.authorname = user.nickname;
      //ctx.body = mybook;
    } catch (e) {
      ctx.throw(500, e);
    }
      //const user = await User.findById(mybook.author).exec();
    //ctx.body = mybook;

    
};



exports.updateBook = async (ctx) => {
    // validation추가 필요
    const file = ctx.request.files;
    if(ctx.request.body.cover != undefined) // when user add a new pet image
      ctx.request.body.cover = fs.readFileSync(file.image.path);
    else
      ctx.request.body.cover = ""
  
    var book = ctx.request.body; //require books's _id
    try {
      const mybook = await Book.findOne({ _id: book._id });
      
      mybook.updateB(book);
  
      ctx.body = book._id;
    } catch (e) {
      ctx.throw(500, e);
    }
    ctx.body = book._id;
  
    console.log(book);
    ctx.status = 200;
  };


exports.deleteBook = async (ctx) => {
    try {
        var b = await Book.find(ctx.params.id);
        await Page.deleteMany({"pages":{$in:b.pages}});//book에 있던 페이지 다 지우기 
    } catch (e) {
        if(e.name === 'CastError') {
            ctx.status = 400;
            return;
        }
    }
    ctx.status = 204; // No Content
};

exports.detailBook = async (ctx) => {
    var ObjectId = require('mongodb').ObjectId; 
    var id = req.params.book_id;      
    var o_id = new ObjectId(id);
    const book = await db.Book.find({_id:o_id});
    ctx.body = book;
    ctx.status = 200;
};

exports.scrollBook = async (ctx) => {
  //클라이언트에서 미리 요청하는 방법 사용하자

  //select: 조회순 or 추천순
  //renewal: 앱 화면 바닥에 도달한 횟수 (처음으로 데이터를 추가로 가져올때 1, 그다음 2 ...)
  const {filter, renewal} = ctx.query

  if(filter === "조회순") {  //조회순
      try {
          const books = await Book.find().sort({'views': -1}).skip(parseInt(renewal)*10).limit(10)
          let result = await bookInfo(books);
          ctx.status = 200;
          ctx.body = result;
      } catch (e) {
          ctx.throw(500, e);
      }
  }

  else if(filter === "추천순") { //추천순

  }
};